The Expression of Emotion in Man

Description

This book has been translated by Center for Arab Unity Studies

The Expression of the Emotions in Man and Animals is a book by Charles Darwin, published in 1872, concerning genetically determined aspects of behaviour.

It was published thirteen years after On The Origin of Species and is, alongside his 1871 book The Descent of Man, Darwin’s main consideration of human origins.

The Expression was an original and, for many contemporaries, a controversial book.

It formed the final part of a series that had started with On the Origin of Species and had controversially peaked the previous year with the Descent of Man.

The former, published in 1859, laid out Darwin’s theory of descent with modification through natural selection in animals and plants: the notion that randomly occurring variation within a population, if conferring a breeding or survival advantage, tends to be preserved, leading over time to divergence.

The Descent, in which he extended the theory to humans, appeared more than a decade later in 1871, its publication delayed by a reticent Darwin.

Sentiments in the mid 19th century were very different from now.

For many – even those willing to concede evolution in animals – extending the thesis to humans was a step too far.

Many of the author’s contemporaries pointed to human rationality, spirituality and civilization as sufficient proof of divine creation.

For such critics, the dawn of humanity was a matter for theologians, not a legitimate area of study for naturalists.

To convince the sceptics, it was important for Darwin to accumulate as much evidence for humans’ and animals’ shared roots as possible.

The Expression was intended to do just that. Prior to its publication, the benchmark work on the human face was written by the creationist Sir Charles Bell (1774-1842).

Bell believed that human facial muscles were divinely created to express uniquely human emotions. Darwin refuted this; he was sure that inner feelings of humans and animals were outwardly manifested in similar ways.

For example, in both humans and animals, lips purse during concentration, anger leads to eye-muscle contraction and teeth exposure, while mouths hang agape when listening intently.

He believed that such expressions must have developed through common evolutionary mechanisms, and that they were “daily, living proof of [our] animal ancestry”.

The Expression of Emotion in Man

For more books, click here